Date: Sat, 21 Feb 2004 10:28:32 -0800 (PST) From: Robert Watson <rwatson@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 47320 for review Message-ID: <200402211828.i1LISWjG062064@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=47320 Change 47320 by rwatson@rwatson_paprika on 2004/02/21 10:28:09 Pull socket-level entry points out of mac_net.c into mac_socket.c. Pull inet-specific entry points out of mac_net into mac_inet.c. Generic mbuf routines, bpf routines, and ifnet routines remain in mac_net.c. Affected files ... .. //depot/projects/trustedbsd/mac/sys/security/mac/mac_inet.c#1 add .. //depot/projects/trustedbsd/mac/sys/security/mac/mac_internal.h#19 edit .. //depot/projects/trustedbsd/mac/sys/security/mac/mac_net.c#22 edit .. //depot/projects/trustedbsd/mac/sys/security/mac/mac_socket.c#1 add Differences ... ==== //depot/projects/trustedbsd/mac/sys/security/mac/mac_internal.h#19 (text+ko) ==== @@ -1,7 +1,7 @@ /*- * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson * Copyright (c) 2001 Ilmar S. Habibulin - * Copyright (c) 2001, 2002, 2003 Networks Associates Technology, Inc. + * Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc. * All rights reserved. * * This software was developed by Robert Watson and Ilmar Habibulin for the @@ -62,7 +62,9 @@ extern struct mac_policy_list_head mac_policy_list; extern struct mac_policy_list_head mac_static_policy_list; extern int mac_late; +extern int mac_enforce_network; extern int mac_enforce_process; +extern int mac_enforce_socket; extern int mac_enforce_sysv; extern int mac_enforce_vm; #ifndef MAC_ALWAYS_LABEL_MBUF @@ -118,6 +120,8 @@ int mac_internalize_cred_label(struct label *label, char *string); void mac_relabel_cred(struct ucred *cred, struct label *newlabel); +struct label *mac_mbuf_to_label(struct mbuf *m); + void mac_copy_pipe_label(struct label *src, struct label *dest); int mac_externalize_pipe_label(struct label *label, char *elements, char *outbuf, size_t outbuflen); ==== //depot/projects/trustedbsd/mac/sys/security/mac/mac_net.c#22 (text+ko) ==== @@ -1,7 +1,7 @@ /*- * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson * Copyright (c) 2001 Ilmar S. Habibulin - * Copyright (c) 2001, 2002, 2003 Networks Associates Technology, Inc. + * Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc. * All rights reserved. * * This software was developed by Robert Watson and Ilmar Habibulin for the @@ -61,42 +61,30 @@ #include <net/if.h> #include <net/if_var.h> -#include <netinet/in.h> -#include <netinet/in_pcb.h> -#include <netinet/ip_var.h> - #include <security/mac/mac_internal.h> -static int mac_enforce_network = 1; +/* + * mac_enforce_network is used by IPv4 and IPv6 checks, and so must + * be non-static for now. + */ +int mac_enforce_network = 1; SYSCTL_INT(_security_mac, OID_AUTO, enforce_network, CTLFLAG_RW, &mac_enforce_network, 0, "Enforce MAC policy on network packets"); TUNABLE_INT("security.mac.enforce_network", &mac_enforce_network); -static int mac_enforce_socket = 1; -SYSCTL_INT(_security_mac, OID_AUTO, enforce_socket, CTLFLAG_RW, - &mac_enforce_socket, 0, "Enforce MAC policy on socket operations"); -TUNABLE_INT("security.mac.enforce_socket", &mac_enforce_socket); - #ifdef MAC_DEBUG -static unsigned int nmacmbufs, nmacifnets, nmacbpfdescs, nmacsockets, - nmacinpcbs, nmacipqs; +static unsigned int nmacifnets, nmacmbufs, nmacbpfdescs; +SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ifnets, CTLFLAG_RD, + &nmacifnets, 0, "number of ifnets in use"); SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, mbufs, CTLFLAG_RD, &nmacmbufs, 0, "number of mbufs in use"); -SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ifnets, CTLFLAG_RD, - &nmacifnets, 0, "number of ifnets in use"); -SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, inpcbs, CTLFLAG_RD, - &nmacinpcbs, 0, "number of inpcbs in use"); -SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ipqs, CTLFLAG_RD, - &nmacipqs, 0, "number of ipqs in use"); SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, bpfdescs, CTLFLAG_RD, &nmacbpfdescs, 0, "number of bpfdescs in use"); -SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, sockets, CTLFLAG_RD, - &nmacsockets, 0, "number of sockets in use"); #endif -static struct label * -mbuf_to_label(struct mbuf *mbuf) +struct label * +mac_mbuf_to_label(struct mbuf *mbuf) { struct m_tag *tag; struct label *label; @@ -143,66 +131,7 @@ ifp->if_label = mac_ifnet_label_alloc(); } -static struct label * -mac_inpcb_label_alloc(int flag) -{ - struct label *label; - int error; - - label = mac_labelzone_alloc(flag); - if (label == NULL) - return (NULL); - MAC_CHECK(init_inpcb_label, label, flag); - if (error) { - MAC_PERFORM(destroy_inpcb_label, label); - mac_labelzone_free(label); - return (NULL); - } - MAC_DEBUG_COUNTER_INC(&nmacinpcbs); - return (label); -} - int -mac_init_inpcb(struct inpcb *inp, int flag) -{ - - inp->inp_label = mac_inpcb_label_alloc(flag); - if (inp->inp_label == NULL) - return (ENOMEM); - return (0); -} - -static struct label * -mac_ipq_label_alloc(int flag) -{ - struct label *label; - int error; - - label = mac_labelzone_alloc(flag); - if (label == NULL) - return (NULL); - - MAC_CHECK(init_ipq_label, label, flag); - if (error) { - MAC_PERFORM(destroy_ipq_label, label); - mac_labelzone_free(label); - return (NULL); - } - MAC_DEBUG_COUNTER_INC(&nmacipqs); - return (label); -} - -int -mac_init_ipq(struct ipq *ipq, int flag) -{ - - ipq->ipq_label = mac_ipq_label_alloc(flag); - if (ipq->ipq_label == NULL) - return (ENOMEM); - return (0); -} - -int mac_init_mbuf_tag(struct m_tag *tag, int flag) { struct label *label; @@ -250,62 +179,6 @@ return (0); } -struct label * -mac_socket_label_alloc(int flag) -{ - struct label *label; - int error; - - label = mac_labelzone_alloc(flag); - if (label == NULL) - return (NULL); - - MAC_CHECK(init_socket_label, label, flag); - if (error) { - MAC_PERFORM(destroy_socket_label, label); - mac_labelzone_free(label); - return (NULL); - } - MAC_DEBUG_COUNTER_INC(&nmacsockets); - return (label); -} - -static struct label * -mac_socket_peer_label_alloc(int flag) -{ - struct label *label; - int error; - - label = mac_labelzone_alloc(flag); - if (label == NULL) - return (NULL); - - MAC_CHECK(init_socket_peer_label, label, flag); - if (error) { - MAC_PERFORM(destroy_socket_peer_label, label); - mac_labelzone_free(label); - return (NULL); - } - MAC_DEBUG_COUNTER_INC(&nmacsockets); - return (label); -} - -int -mac_init_socket(struct socket *so, int flag) -{ - - so->so_label = mac_socket_label_alloc(flag); - if (so->so_label == NULL) - return (ENOMEM); - so->so_peerlabel = mac_socket_peer_label_alloc(flag); - if (so->so_peerlabel == NULL) { - mac_socket_label_free(so->so_label); - so->so_label = NULL; - return (ENOMEM); - } - return (0); -} - static void mac_bpfdesc_label_free(struct label *label) { @@ -340,41 +213,7 @@ ifp->if_label = NULL; } -static void -mac_inpcb_label_free(struct label *label) -{ - - MAC_PERFORM(destroy_inpcb_label, label); - mac_labelzone_free(label); - MAC_DEBUG_COUNTER_DEC(&nmacinpcbs); -} - -void -mac_destroy_inpcb(struct inpcb *inp) -{ - - mac_inpcb_label_free(inp->inp_label); - inp->inp_label = NULL; -} - -static void -mac_ipq_label_free(struct label *label) -{ - - MAC_PERFORM(destroy_ipq_label, label); - mac_labelzone_free(label); - MAC_DEBUG_COUNTER_DEC(&nmacipqs); -} - void -mac_destroy_ipq(struct ipq *ipq) -{ - - mac_ipq_label_free(ipq->ipq_label); - ipq->ipq_label = NULL; -} - -void mac_destroy_mbuf_tag(struct m_tag *tag) { struct label *label; @@ -387,34 +226,6 @@ } void -mac_socket_label_free(struct label *label) -{ - - MAC_PERFORM(destroy_socket_label, label); - mac_labelzone_free(label); - MAC_DEBUG_COUNTER_DEC(&nmacsockets); -} - -static void -mac_socket_peer_label_free(struct label *label) -{ - - MAC_PERFORM(destroy_socket_peer_label, label); - mac_labelzone_free(label); - MAC_DEBUG_COUNTER_DEC(&nmacsockets); -} - -void -mac_destroy_socket(struct socket *socket) -{ - - mac_socket_label_free(socket->so_label); - socket->so_label = NULL; - mac_socket_peer_label_free(socket->so_peerlabel); - socket->so_peerlabel = NULL; -} - -void mac_copy_mbuf_tag(struct m_tag *src, struct m_tag *dest) { struct label *src_label, *dest_label; @@ -429,13 +240,6 @@ MAC_PERFORM(copy_mbuf_label, src_label, dest_label); } -void -mac_copy_socket_label(struct label *src, struct label *dest) -{ - - MAC_PERFORM(copy_socket_label, src, dest); -} - static int mac_externalize_ifnet_label(struct label *label, char *elements, char *outbuf, size_t outbuflen) @@ -447,29 +251,7 @@ return (error); } -int -mac_externalize_socket_label(struct label *label, char *elements, - char *outbuf, size_t outbuflen) -{ - int error; - - MAC_EXTERNALIZE(socket, label, elements, outbuf, outbuflen); - - return (error); -} - static int -mac_externalize_socket_peer_label(struct label *label, char *elements, - char *outbuf, size_t outbuflen) -{ - int error; - - MAC_EXTERNALIZE(socket_peer, label, elements, outbuf, outbuflen); - - return (error); -} - -static int mac_internalize_ifnet_label(struct label *label, char *string) { int error; @@ -479,16 +261,6 @@ return (error); } -int -mac_internalize_socket_label(struct label *label, char *string) -{ - int error; - - MAC_INTERNALIZE(socket, label, string); - - return (error); -} - void mac_create_ifnet(struct ifnet *ifnet) { @@ -497,14 +269,6 @@ } void -mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp) -{ - - MAC_PERFORM(create_inpcb_from_socket, so, so->so_label, inp, - inp->inp_label); -} - -void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d) { @@ -512,100 +276,12 @@ } void -mac_create_socket(struct ucred *cred, struct socket *socket) -{ - - MAC_PERFORM(create_socket, cred, socket, socket->so_label); -} - -void -mac_create_socket_from_socket(struct socket *oldsocket, - struct socket *newsocket) -{ - - MAC_PERFORM(create_socket_from_socket, oldsocket, oldsocket->so_label, - newsocket, newsocket->so_label); -} - -static void -mac_relabel_socket(struct ucred *cred, struct socket *socket, - struct label *newlabel) -{ - - MAC_PERFORM(relabel_socket, cred, socket, socket->so_label, newlabel); -} - -void -mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct socket *socket) -{ - struct label *label; - - label = mbuf_to_label(mbuf); - - MAC_PERFORM(set_socket_peer_from_mbuf, mbuf, label, socket, - socket->so_peerlabel); -} - -void -mac_set_socket_peer_from_socket(struct socket *oldsocket, - struct socket *newsocket) -{ - - MAC_PERFORM(set_socket_peer_from_socket, oldsocket, - oldsocket->so_label, newsocket, newsocket->so_peerlabel); -} - -void -mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram) -{ - struct label *label; - - label = mbuf_to_label(datagram); - - MAC_PERFORM(create_datagram_from_ipq, ipq, ipq->ipq_label, - datagram, label); -} - -void -mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment) -{ - struct label *datagramlabel, *fragmentlabel; - - datagramlabel = mbuf_to_label(datagram); - fragmentlabel = mbuf_to_label(fragment); - - MAC_PERFORM(create_fragment, datagram, datagramlabel, fragment, - fragmentlabel); -} - -void -mac_create_ipq(struct mbuf *fragment, struct ipq *ipq) -{ - struct label *label; - - label = mbuf_to_label(fragment); - - MAC_PERFORM(create_ipq, fragment, label, ipq, ipq->ipq_label); -} - -void -mac_create_mbuf_from_inpcb(struct inpcb *inp, struct mbuf *m) -{ - struct label *mlabel; - - INP_LOCK_ASSERT(inp); - mlabel = mbuf_to_label(m); - - MAC_PERFORM(create_mbuf_from_inpcb, inp, inp->inp_label, m, mlabel); -} - -void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf) { struct label *oldmbuflabel, *newmbuflabel; - oldmbuflabel = mbuf_to_label(oldmbuf); - newmbuflabel = mbuf_to_label(newmbuf); + oldmbuflabel = mac_mbuf_to_label(oldmbuf); + newmbuflabel = mac_mbuf_to_label(newmbuf); MAC_PERFORM(create_mbuf_from_mbuf, oldmbuf, oldmbuflabel, newmbuf, newmbuflabel); @@ -616,7 +292,7 @@ { struct label *label; - label = mbuf_to_label(mbuf); + label = mac_mbuf_to_label(mbuf); MAC_PERFORM(create_mbuf_from_bpfdesc, bpf_d, bpf_d->bd_label, mbuf, label); @@ -627,7 +303,7 @@ { struct label *label; - label = mbuf_to_label(mbuf); + label = mac_mbuf_to_label(mbuf); MAC_PERFORM(create_mbuf_linklayer, ifnet, ifnet->if_label, mbuf, label); @@ -638,7 +314,7 @@ { struct label *label; - label = mbuf_to_label(mbuf); + label = mac_mbuf_to_label(mbuf); MAC_PERFORM(create_mbuf_from_ifnet, ifnet, ifnet->if_label, mbuf, label); @@ -650,8 +326,8 @@ { struct label *oldmbuflabel, *newmbuflabel; - oldmbuflabel = mbuf_to_label(oldmbuf); - newmbuflabel = mbuf_to_label(newmbuf); + oldmbuflabel = mac_mbuf_to_label(oldmbuf); + newmbuflabel = mac_mbuf_to_label(newmbuf); MAC_PERFORM(create_mbuf_multicast_encap, oldmbuf, oldmbuflabel, ifnet, ifnet->if_label, newmbuf, newmbuflabel); @@ -662,88 +338,14 @@ { struct label *oldmbuflabel, *newmbuflabel; - oldmbuflabel = mbuf_to_label(oldmbuf); - newmbuflabel = mbuf_to_label(newmbuf); + oldmbuflabel = mac_mbuf_to_label(oldmbuf); + newmbuflabel = mac_mbuf_to_label(newmbuf); MAC_PERFORM(create_mbuf_netlayer, oldmbuf, oldmbuflabel, newmbuf, newmbuflabel); } int -mac_fragment_match(struct mbuf *fragment, struct ipq *ipq) -{ - struct label *label; - int result; - - label = mbuf_to_label(fragment); - - result = 1; - MAC_BOOLEAN(fragment_match, &&, fragment, label, ipq, - ipq->ipq_label); - - return (result); -} - -void -mac_reflect_mbuf_icmp(struct mbuf *m) -{ - struct label *label; - - label = mbuf_to_label(m); - - MAC_PERFORM(reflect_mbuf_icmp, m, label); -} -void -mac_reflect_mbuf_tcp(struct mbuf *m) -{ - struct label *label; - - label = mbuf_to_label(m); - - MAC_PERFORM(reflect_mbuf_tcp, m, label); -} - -void -mac_update_ipq(struct mbuf *fragment, struct ipq *ipq) -{ - struct label *label; - - label = mbuf_to_label(fragment); - - MAC_PERFORM(update_ipq, fragment, label, ipq, ipq->ipq_label); -} - -int -mac_update_mbuf_from_cipso(struct mbuf *m, char *cp, int *code) -{ - struct label *label, *ifnetlabel; - int error; - - label = mbuf_to_label(m); - - if (m->m_pkthdr.rcvif != NULL) - ifnetlabel = m->m_pkthdr.rcvif->if_label; - else - ifnetlabel = NULL; - - MAC_CHECK(update_mbuf_from_cipso, m, label, m->m_pkthdr.rcvif, - ifnetlabel, cp, code); - - return (error); -} - -void -mac_create_mbuf_from_socket(struct socket *socket, struct mbuf *mbuf) -{ - struct label *label; - - label = mbuf_to_label(mbuf); - - MAC_PERFORM(create_mbuf_from_socket, socket, socket->so_label, mbuf, - label); -} - -int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet) { int error; @@ -768,7 +370,7 @@ if (!mac_enforce_network) return (0); - label = mbuf_to_label(mbuf); + label = mac_mbuf_to_label(mbuf); MAC_CHECK(check_ifnet_transmit, ifnet, ifnet->if_label, mbuf, label); @@ -777,134 +379,6 @@ } int -mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m) -{ - struct label *label; - int error; - - M_ASSERTPKTHDR(m); - - if (!mac_enforce_socket) - return (0); - - label = mbuf_to_label(m); - - MAC_CHECK(check_inpcb_deliver, inp, inp->inp_label, m, label); - - return (error); -} - -int -mac_check_socket_bind(struct ucred *ucred, struct socket *socket, - struct sockaddr *sockaddr) -{ - int error; - - if (!mac_enforce_socket) - return (0); - - MAC_CHECK(check_socket_bind, ucred, socket, socket->so_label, - sockaddr); - - return (error); -} - -int -mac_check_socket_connect(struct ucred *cred, struct socket *socket, - struct sockaddr *sockaddr) -{ - int error; - - if (!mac_enforce_socket) - return (0); - - MAC_CHECK(check_socket_connect, cred, socket, socket->so_label, - sockaddr); - - return (error); -} - -int -mac_check_socket_deliver(struct socket *socket, struct mbuf *mbuf) -{ - struct label *label; - int error; - - if (!mac_enforce_socket) - return (0); - - label = mbuf_to_label(mbuf); - - MAC_CHECK(check_socket_deliver, socket, socket->so_label, mbuf, - label); - - return (error); -} - -int -mac_check_socket_listen(struct ucred *cred, struct socket *socket) -{ - int error; - - if (!mac_enforce_socket) - return (0); - - MAC_CHECK(check_socket_listen, cred, socket, socket->so_label); - return (error); -} - -int -mac_check_socket_receive(struct ucred *cred, struct socket *so) -{ - int error; - - if (!mac_enforce_socket) - return (0); - - MAC_CHECK(check_socket_receive, cred, so, so->so_label); - - return (error); -} - -static int -mac_check_socket_relabel(struct ucred *cred, struct socket *socket, - struct label *newlabel) -{ - int error; - - MAC_CHECK(check_socket_relabel, cred, socket, socket->so_label, - newlabel); - - return (error); -} - -int -mac_check_socket_send(struct ucred *cred, struct socket *so) -{ - int error; - - if (!mac_enforce_socket) - return (0); - - MAC_CHECK(check_socket_send, cred, so, so->so_label); - - return (error); -} - -int -mac_check_socket_visible(struct ucred *cred, struct socket *socket) -{ - int error; - - if (!mac_enforce_socket) - return (0); - - MAC_CHECK(check_socket_visible, cred, socket, socket->so_label); - - return (error); -} - -int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, struct ifnet *ifnet) { @@ -994,127 +468,3 @@ mac_ifnet_label_free(intlabel); return (0); } - -void -mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp) -{ - - /* XXX: assert socket lock. */ - INP_LOCK_ASSERT(inp); - MAC_PERFORM(inpcb_sosetlabel, so, so->so_label, inp, inp->inp_label); -} - -int -mac_socket_label_set(struct ucred *cred, struct socket *so, - struct label *label) -{ - int error; - - error = mac_check_socket_relabel(cred, so, label); - if (error) - return (error); - - mac_relabel_socket(cred, so, label); - - /* - * If the protocol has expressed interest in socket layer changes, - * such as if it needs to propagate changes to a cached pcb - * label from the socket, notify it of the label change while - * holding the socket lock. - */ - if (so->so_proto->pr_usrreqs->pru_sosetlabel != NULL) - (so->so_proto->pr_usrreqs->pru_sosetlabel)(so); - - return (0); -} - -int -mac_setsockopt_label(struct ucred *cred, struct socket *so, struct mac *mac) -{ - struct label *intlabel; - char *buffer; - int error; - - error = mac_check_structmac_consistent(mac); - if (error) - return (error); - - buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK); - error = copyinstr(mac->m_string, buffer, mac->m_buflen, NULL); - if (error) { - free(buffer, M_MACTEMP); - return (error); - } - - intlabel = mac_socket_label_alloc(M_WAITOK); - error = mac_internalize_socket_label(intlabel, buffer); - free(buffer, M_MACTEMP); - if (error) - goto out; - - /* XXX: Socket lock here. */ - error = mac_socket_label_set(cred, so, intlabel); - /* XXX: Socket unlock here. */ -out: - mac_socket_label_free(intlabel); - return (error); -} - -int -mac_getsockopt_label(struct ucred *cred, struct socket *so, struct mac *mac) -{ - char *buffer, *elements; - int error; - - error = mac_check_structmac_consistent(mac); - if (error) - return (error); - - elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK); - error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL); - if (error) { - free(elements, M_MACTEMP); - return (error); - } - - buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO); - error = mac_externalize_socket_label(so->so_label, elements, - buffer, mac->m_buflen); - if (error == 0) - error = copyout(buffer, mac->m_string, strlen(buffer)+1); - - free(buffer, M_MACTEMP); - free(elements, M_MACTEMP); - - return (error); -} - -int -mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so, - struct mac *mac) -{ - char *elements, *buffer; - int error; - - error = mac_check_structmac_consistent(mac); - if (error) - return (error); - - elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK); - error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL); - if (error) { - free(elements, M_MACTEMP); - return (error); - } - - buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO); - error = mac_externalize_socket_peer_label(so->so_peerlabel, - elements, buffer, mac->m_buflen); - if (error == 0) - error = copyout(buffer, mac->m_string, strlen(buffer)+1); - - free(buffer, M_MACTEMP); - free(elements, M_MACTEMP); - - return (error); -}
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